标题： 类Υ粒子态与奇特量子数 $J^{PC} = 3^{-+}$ 显示英文标题

标题： Charmonium-like states with the exotic quantum number $J^{PC} = 3^{-+}$

摘要： 我们应用QCD求和法则来研究具有奇异量子数$J^{PC} = 3^{-+}$的$q c \bar q \bar c$四夸克态，并提取最低能态的质量为${4.49^{+0.45}_{-0.41}}$GeV。 为了构建相关的四夸克电流，我们需要显式地添加协变导数算符。 我们对这些插值电流的系统分析表明：a) 这个态容易衰变为$P$波$[\rho J/\psi] / [\omega J/\psi ]$通道，但不衰变为$ [\rho \chi_{c2}]/[\omega \chi_{c2}]/[J/\psi f_2(1270)]$通道，以及 b) 它容易衰变为$[D^* \bar D_2^*]$通道，但不衰变为$P$波$[D^* \bar D^*]$通道。 显示英文摘要

摘要： We apply the method of QCD sum rules to study the $q c \bar q \bar c$ tetraquark states with the exotic quantum number $J^{PC} = 3^{-+}$, and extract the mass of the lowest-lying state to be ${4.49^{+0.45}_{-0.41}}$ GeV. To construct the relevant tetraquark currents we need to explicitly add the covariant derivative operator. Our systematic analysis of these interpolating currents indicates that: a) this state readily decays into the $P$-wave $[\rho J/\psi] / [\omega J/\psi ]$ channel but not into the $ [\rho \chi_{c2}]/[\omega \chi_{c2}]/[J/\psi f_2(1270)]$ channels, and b) it readily decays into the $[D^* \bar D_2^*]$ channel but not into the $P$-wave $[D^* \bar D^*]$ channel.